Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1ab59a40b5cd4a…

MALICIOUS

PDF

73.5 KB Created: 2021-03-19 14:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 066519e64911dda774144a51db519bb9 SHA-1: d5a4fc9de1d2beb19ddcd3e9e10656d7360f9656 SHA-256: 3c1ab59a40b5cd4a3e4ccf199dd605bc17b218bd9b395d16bf998d0d33071c5f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of numerous links, many hosted on disposable domains, strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/aws?utm_term=ryobi+4+cycle+weed+eater+troubleshooting In PDF document text
    • http://vadanunagirira.getenjoyment.net/53835176935.pdfIn PDF document text
    • http://edaruzal.xyz/crab_clipart_template8q8na.pdfIn PDF document text
    • http://goginexoze.22web.org/nikon_d40_instructions.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/african_american_skits_for_black_history.pdfIn PDF document text
    • http://tujofifebituxuv.22web.org/67376677897.pdfIn PDF document text
    • http://dk-inc.xyz/el_ser_y_la_nada_19439vyic.pdfIn PDF document text
    • http://fredo.bike/xojepubazoxoxuzoxoruzaq7sf6.pdfIn PDF document text
    • http://domen3.club/nezudamijoxezu7yvm7.pdfIn PDF document text
    • http://xitnet.fun/dodge_stratus_2006_tire_size4uu7m.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/boswellia_papyrifera.pdfIn PDF document text
    • http://nebemor.mywebcommunity.org/dawuku.pdfIn PDF document text
    • http://smirno.life/jazz_music_trumpet_sheet_musicfxgni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paxurebuguxowi.rf.gd/kububujekudanobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/373cc11b-8ae9-4136-9d5a-bd79b243a102/62637981879.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/jaxolaxidotosuf.pdfIn PDF document text
    • http://tadiwolavis.epizy.com/what_does_a_gypsy_moth_eat.pdfIn PDF document text
    • http://tanonarimunal.myartsonline.com/evh_5150_iii_combo_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d570ee08-2e8c-4336-b3a2-828ea2dc09a5/what_does_the_saying_under_his_eye_mean_in_the_bible.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/biology_download_class_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7cba3d-06c7-45cc-9fdd-4f4ba4ef7cad/jisenebedubokoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58584a09-e5d1-4746-b660-fdff35b0734c/fallout_4_mod_crash_fix_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943741f5-6130-43bf-b482-88d5778e6464/wizards_first_rule_hardback_book.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 5632 bytes
SHA-256: 4e1776e3bbf6f69364703e45dbbea4cf08a9cde409ce56dc966a916b2b9f1471
font_01_sfnt_off0000f550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 10360 bytes
SHA-256: facd7e60ff35cb8951a46352ffb2dbdaeaf38b67eeaf490ba36b171b3fd912bf

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